Complete Web Design solution for my Website

I wanted to make an existing site much more professional and informative for people. I already posted this project on this site. But I cancel it and reposting the same project with much more details and also changed the project category. Below are my requirements. I would like to have a website through which people should interact with each other and add contents directly on the site like Wikipedia with edit and save option. You can use any Existing CMS like Wikimedia or plone or your own scripts. If you are planning to use CMS ensure that cms policy or license terms should not restrict me to make my site commercial. A page to upload and view documents added by registered users (Like [login to view URL]) Along with website design SEO and space - layout for banners, text ads or any ads has to be managed and implemented. Note: Looking for only serious , professional and experienced team to work on this project. Existing website: [login to view URL]